fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <style> .descendants * { display: block; border: 2px solid lightgrey; color: lightgrey; padding: 5px; margin: 15px; } </style> <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"> </script> <script> $(document).ready(function(){ $("div").find("span").css({"color":"red","border":"2px solid red"}); }); </script> </head> <body> <div class="descendants" style="width:500px;">div (当前元素) <p>p (儿子元素) <span>span (孙子元素)</span> </p> <p>p (儿子元素) <span>span (孙子元素)</span> </p> </div> </body> </html>
运行结果